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Process intensification towards sustainable wastewater treatment with phototropic biofilms

Project description

Lighting the way to greener wastewater treatment

Europe’s wastewater treatment plants are vital for protecting the environment, but conventional systems demand large amounts of oxygen and release significant CO2. A new generation of biological treatment could change that. The EU-funded InLight project aims to explore how light-driven microorganisms can clean wastewater more sustainably by converting CO2 into oxygen and useful biofeedstock. Using photobioreactors and advanced modelling, the project investigates how light, fluid dynamics, and microbial communities interact within biofilms known as photogranules. By uniting engineering, microbiology, and environmental science, InLight aims to design efficient, aeration-free treatment systems that reduce emissions and energy use, bringing the EU closer to truly sustainable water management.

Objective

Improving current biological wastewater treatment (WWT) plants towards more sustainable solutions is a priority of the EU (Water Framework Directive). Conventional activated sludge technology faces some challenges such as high O2 demand and inevitable CO2 emissions. Phototropic microorganisms offer a sustainable way of WWT by converting CO2 to O2 and valuable biofeedstock which can further be converted to bioenergy. Photogranules are compact spherical biofilms which contain high amounts of phototrophs in addition to heterotrophs. As a result, photogranule based WWT can couple CO2 and O2 fluxes from different microorganisms leading to an aeration free WWT. However, to utilize the true potential of this technology, revolutionary reactor designs together with more fundamental understanding on photogranulanation is needed. This work aims to intensify photobioreactors for WWT by using a multidisciplinary approach which combines microrhelogy and microbiology with mass and photon transport models. To have more control over growth and light, novel supports for biofilms will be designed. In addition, the project will explore the relationship between environmental conditions such as light availability and shear on microbial community composition and structure in complex phototropic biofilms by both microfluidic experiments and mathematical models. The information obtained from these studies will be translated to a macroscopic level using simplified transport phenomena models to design an efficient photobioreactor. The findings of this study will both advance our understanding of phototropic biofilms and pave the way towards industrial-scale sustainable WWT. With this project, I am aiming to combine my background on design and modelling of light-driven multiphase systems with the distinguished expertise of the host research group in WWT at TU Delft while acquiring further knowledge on mass transfer in photobiofilms during my secondment at ETH Zurich.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2022-PF-01

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Coordinator

TECHNISCHE UNIVERSITEIT DELFT
Net EU contribution
€ 203 464,32
Total cost
No data

Partners (1)